TABLE OF CONTENTS 
Hydrogen Ion Concentration and the 
Composition of Nutrient Solutions in 
Relation to the Growth of Pee Plants 
Humidity in Relation to Moisture Imbi- 
bition by Wood and to Spore Germina- 
BEBE MUN Li C o er a S. M. Zeller 
On Carbohydrate Consumption by Azoto- | 
bacter chroococcum.................. . R. Allen 
The Thelephoraceae of North America. 
BF S A Ses RR CREDAT TES E. A. Burt 
Studies in the Physiology of the Fungi. 
XI. Bacterial Inhibition by Metabolic 
ELOGIA os oe y e oes W. H. Chambers 
The Nutritive Value of the Food Reserve 
e o a ee iA vr B. M. Duggar 
Titration Curves of Certain Liquid Cul- 
ture Media. . ..J. L. Karrer and R. W. Webb 
The Use of *Insoluble" Salts in Balanced 
Solutions for Seed Plants pt B, M. Duggar 
COREA inde tó Volmea VIE... ica 
PAGE 
1- 49 
51- 74 
75- 79 
81—248 
249-289 
291-298 
299-305 
307-327 
329-333 
